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Senior Backend Engineer - R-Storefront Section, EC Marketplace Development Department (ECMPD)

Tokyo, Japan💼 Full-time🗓 2026-10-02 → 2026-10-07

Core

Design, develop, and operate web system backends for a large-scale e-commerce platform, leading engineering teams and making technical decisions under high-load conditions.

Role type

Senior Backend Engineering Lead

Builds

User-facing features for large-scale e-commerce systems

Domain

E-commerce / Web Systems

Required skills

Java/Spring Boot, REST API design, Relational Database (Oracle/MySQL), Linux, Gradle, Git, CI/CD (Jenkins), Container architecture (Docker/Kubernetes), System design, Team leadership, Production troubleshooting

Preferred skills

Performance/stress/load testing, Redis, Kafka, ElasticSearch, Grafana, Kibana, PHP frameworks, CKA/CKAD certification

Technologies

Java, Spring Boot, Oracle, MySQL, Tomcat, WebLogic, Linux, Gradle, Git, Jenkins, Docker, Kubernetes, Redis, Kafka, ElasticSearch, Grafana, Kibana, PHP (via careerplan.io/jobs/1038554-senior-backend-engineer-r-storefront-section-ec-marketplace-development-department-ecmpd-a)

Responsibilities

Understand business requirements and deliver high-quality features; Lead project or team from design to operation; Make technical decisions for complex systems; Perform system design, implementation, testing, and release; Manage operations including inquiry and investigation tasks

Seniority

Senior, hands-on IC with leadership responsibilities